Yielding pitman for looms



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`1 J. E. RENNE YIELDING PITMAN FOR LoMs Filed Aug. 18, 1925 las@ k vReTm JDSEH E. RENNE, OF PEERSON, INEW JERSEY.

YIELDNG P'IMAN FR LOMS.

Application filed August 1S, 1923 Serial No. 658,014,

To aZZ whom t may concern.'

Be it known that l, JOSEPH E. RENNE,

a citizen of the United States, residing at Paterson7 in the county of Passaic and Sta-te of New Jersey, have invented certain new and useful llinprovements in Yielding Pitmen for Looms, of which the following is a specification.

l This invention relates to looms and in particular to the means for connecting the hatten with the crank-shaft of a loom whereby to impart movement from the latter to the former. rIhe object of the invention is to provide an improvement in that class of such connections in which provision is made for permitting a cushioning of the beating-up stroke imparted by the crank-shaft to the batten and thereby .reducing the harshness of the beatingup impact of the reed against the fell of the fabric and also saving the breaking of parts of the loom frequently caused by shock incident to such beating-up stroke, especially when the protecting mechanism of the loom acts to check the hatten suddenly during such stroke. The improvements are directed to certain structural features of such a connection designed to make it simple and inexpensive to manufacture and easily applied to a loom, while preserving it fully efficient in action.

In the accompanying drawing, Y

Fig. l is a side elevation of the improved connection, or pitman, the crank-shaft and batten bearing member also appearing (in section) Fig. 2 is a plan of what appears in Fig. l;

Fig. 3 shows two partsg and Z in longitudinal section; and

Fig. 4 is a section on line 4-4, Fig. 1.

The crankshaft of a loom is shown at a and the bearing member by which the batten (not shown) is connected therewith through the improved pitman is shown at a'.

The body structure of the pitman in` cludes a metal strap d having its end portions rebent to form opposite and reversed loops d and Z; its extremities are here shown bent outwardly in the same direction and penetrated and connected by a bolt e having a nut f and a lock-nut f; by forming the stra-p in thel way shown and described the cost of manufacture thereof will be reduced and the assembly therewith of the other parts will be simplified. The two loops receive the crank of the crank shaft and the journal c of the member c and afford bearings therefor, as will appear.

In the loop ((Z) which receives said journal c is iitted a bearing member in the form of a block g which has tapped into it a longitudinal hole g into which is screwed the threaded reduced end of a stem ZLy entending toward the other loop and held from turning by a lock-nut c' thereon screwed up against the block. The block and the loop are penetrated by a bolt y' having a nut j and thus serving to clamp thev block rigidly in place; thus the block and stem become parts of the body structure, rigid with respect to the strap CZ. On .the threaded portion of the stem ZL is a nut l: affording an abutment; it is kept from turning by a locknut Zo.

In the other loop (0Z) is arranged another bearing member in the form of a block Z having a longitudinal hole Z receiving with a sliding lit the smooth free en d of stem Z2. This block is guided for rectilineal movementt only in the strap CZ in part by stem ZL and in part by opposite lugs m which play in slots a formed in the strap.

Both blocks are outwardly recessed to afford bearings which are `coinplementary to the bearings afforded at the bends of the loops in strap aZ and the several bearings may be lined with Babbitt or other half-bushings 0 to lit the crank of the crank-shaft., and the journal c; when the parts o are employed they may be riveted in place as indicated atp.

Between the block Z and the abutment Ze and penetrated by stem Zz is a helical spring r; the tension of the spring may be varied as conditions require by adjusting the nut 7c on the stem. j When the device is in use and the crankshaft imparts the beating-up stroke to member c and hence the batteri carrying the latter the shock will obviously be absorbed by the spring, thereby greatly reducing the harshness of the impact of the reed against the cloth and saving breakage and general wear and tear of the loom parts, in the latter case especially when the hatten is suddenly stopped by the going` into action of the protecting mechanism of the loom.

It is not new to provide a connection between the crank-shaft and hatten of a loom affording an elastic cushion and being thus adapted to absorb the shock incident to the beating-up stroke of the crank-shaft; but

so tai* as l am :aware those combinations of parts which are set forth in the appended claim, involving e. strong7 durable, inexpensive and easilyv assembled yet eieient pitnmn of the yielding class, effe new.

` Havl'lg' thus fully desel'ibeflmy invention, what I Claim and desire to secure by Letters Patent is:

l yielding pitnian including a strap lia-V- ing its end portions -rebent 'to 'foiln opposite and reversed loops, remove-ble means to connect the extremities of the strap, a bearing in onepol the loops, f1-bearing member arranged` in the other loop and slidable towaid and from the end of the pit-nien co1'- responding to saliti loop, and means, inclucl- 'ing e spring, normally opposing 4movement of said ,member toward the other end; of the pitnian.

In testimony whereof 'ax my sgna- 20 ture. 

